Thank you Fendrick, this is exactly what I was looking for.
However, after testing this example and looking at Corona doc, it seems that there is no support for kernel.graph feature.
Corona, can you confirm this is not possible anymore or there is another way ?
kernel.graph = { nodes = { horizontal = { effect="filter.blurHorizontal", input1="paint1" }, vertical = { effect="filter.blurVertical", input1="horizontal" }, }, output = "vertical", }
thanks
You can look at this sample:
https://github.com/coronalabs/samples-coronasdk/tree/master/Graphics/FilterGraphDemo
And see if that will help you.
Rob
Hi.
I’m using multi-pass with the kernel.graph machinery and all. Did you do the rest of the shader boilerplate as well, along with graphics.defineEffect ()?
My second example here runs through the gamut of built-ins that have some effect with their default parameters: postprocessing Do those work on your end?
One thing that stands out in the old link is that the name being assigned to the effect doesn’t include a group, i.e. it’s “filter.X” rather than “filter.group.X”.
Thanks both of you, its now working perfectly, indeed the bug was filter.group…
Glad you figured it out. I made small demo project to show it works
https://gist.github.com/Shchvova/068e64f84671a5ab9ee28aedf53c290e
[lua]
display.setStatusBar( display.HiddenStatusBar )
local effect = {
language = “glsl”,
category = “filter”,
name = “graphDemo”,
graph =
{
nodes = {
dotted = { effect=“filter.polkaDots”, input1=“paint1” },
dotted2 = { effect=“filter.blur”, input1=“dotted” },
bulged = { effect=“filter.bulge”, input1=“dotted2” },
},
output = “bulged”,
},
}
display.loadRemoteImage( “https://upload.wikimedia.org/wikipedia/en/2/24/Lenna.png”, “GET”, function( event )
if ( event.isError ) then
print ( “Network error - download failed” )
return
end
local image = event.target
local r = image.width/image.height
if display.contentWidth/display.contentHeight > r then
image.height = display.contentHeight*0.8
image.width = image.height*r
else
image.width = display.contentWidth*0.8
image.height = image.width/r
end
graphics.defineEffect( effect )
image.fill.effect = “filter.custom.graphDemo”
image.fill.effect.bulged.intensity = 0.85
image.fill.effect.dotted.numPixels = 8
image.fill.effect.dotted.dotRadius = 1
image.fill.effect.dotted.aspectRatio = ( image.width / image.height )
timer.performWithDelay( 2000, function( )
Runtime:addEventListener( “enterFrame”, function( e )
image.fill.effect.bulged.intensity = 0.85 + math.abs(math.sin(e.time*0.001)*0.2)
end )
end )
end, “lenna.png”, display.contentCenterX, display.contentCenterY )
[/lua]
